Fix MacVim CI breakage in Test_mouse_shape_after_cancelling_gr

Set mouseshape correctly when using 'r' or 'gr'. Otherwise Vim will only
do it when mouse moves or window receives focus, which is a little
random. This change will be ported upstream.

src/normal.c

@@ -417,6 +417,9 @@ normal_cmd_get_more_chars(
 	    State = MODE_REPLACE;	// pretend Replace mode
 #ifdef CURSOR_SHAPE
 	    ui_cursor_shape();	// show different cursor shape
+#endif
+#ifdef FEAT_MOUSESHAPE
+	    update_mouseshape(-1);
 #endif
 	}
 	if (lang && curbuf->b_p_iminsert == B_IMODE_LMAP)